Banda Singh Bahadur (also known as Lachman Das, Lachman Dev and Madho Das) (1670–1716) was a military commander. He joined the struggle against the Mughal Empire in early 18th-century India after meeting Guru Gobind Singh, who gave him the new name of Banda Singh Bahadur as a replacement for his birthname. He is best known for the sack of the Mughal provincial capital, Sirhind, and is revered as a martyr of the Sikh army.